Eagle-eyed technical experts prove there is no such thing as a perfect crime as they assemble the pieces every criminal leaves behind. Dramatic crime re-creations and, sometimes, part of the investigations are a staple of the series. Some of the re-creations include alternate versions of the crimes, which are disproved by science. The show's episodes follow each case from the initial investigation until it reaches its legal resolution.

Real-life investigations feature experts drawing on forensic science to solve baffling crimes and other mysteries.

Sex and murder are often tied together in criminal investigations; and detectives uncover dirty secrets, scandalous sex affairs, online sex addictions, jealousy and stunning twisted fantasies when looking for motives for murder.

Host Donnie Wahlberg chronicles the twisted lives of diabolical criminals, such as Charles Manson, Aileen Wuornos, John Wayne Gacy, the Rev. Jim Jones, and others.

Stories of unexpected crimes between seemingly peaceful neighbors that take viewers through the twists and turns of the investigation, the arrest, and the quest for justice.

Chris Cuomo explores the psyche of criminal offenders and the impact of nature vs. nurture on their violent behavior.

BD Wong is not a doctor, although he played one on TV -- forensic psychiatrist/criminal profiler Dr. George Huang on "Law and Order: SVU." So he's familiar with complicated cases and digging deep for proper diagnoses, both of which play into his role as host of "Something's Killing Me." The HLN original production is a six-part documentary series that examines puzzling diseases and symptoms that result in near-death struggles. Featuring re-enactments, each hourlong episode tells actual stories of how doctors, scientists and, in some cases, federal investigators race against time to discover what or who is killing a patient. Included are interviews with victims, their families and doctors.

"Lies, Crimes & Video" is an eight-part documentary series making viewers privy to the 911 calls, interrogations, jailhouse recordings, body camera, and surveillance videos captured as part of criminal investigations. HLN's true crime series shows the rescue of Kala Brown who is found chained inside a storage container as well as the disturbing images of a killer lurking in the hallways of a church where fitness instructor Missy Bevers is found murdered. This raw docu-series lays bare all of the lies, wrongdoings and shocking behaviors -- all caught on camera.

Murder cases involving wives who are found murdered.

Heart-wrenching, personal stories of unsolved missing cases and unexplained deaths that continue to baffle investigators and horrify those left behind.